Similar to the general catalyst addition method, first diluted with solvent or added directly to the reaction system.
Silicone rubber 1.5-3%
Curing agent 0.4-0.6%
HW202 (202A) hammer texture agent, the appearance is white granular powder, and the dosage is 1.5% to 4.5% of the total formula. Users can add leveling agent and brightener to adjust the size of the hammer texture. The hammering agent AS303 of Guangzhou Dalong Chemical Co., Ltd., the dosage is 0.1%~~0.3% of the total formula.
In addition to the above-mentioned internal addition method (that is, the method of adding the hammer texture agent during the batching) to produce the hammer texture powder coating method, the external addition method (that is, the method of adding the hammer texture agent to the foundation towel dupont ptfe fine powder by dry mixing method) can also be used. Method) The method of adding floating agent (patterning agent) to manufacture hammer grain powder coating.
According to this manufacturing method, aluminum powder and a small amount of leveling agent are added together when manufacturing the base powder, and the base powder is manufactured by the melt-extrusion mixing method. The formula of the base powder is designed according to the appearance of the coating film and the pigment. After the base powder is manufactured, dry mix the base powder and the floating flower agent (patterning agent) in a certain ratio to obtain a hammer powder coating. For dry mixing, a double-cone, V-shaped or barrel-shaped mixer can be used. If there is no condition, a high-speed mixer can also be used, but the mixing time should be short. According to the color needs, the pigments can be added together when the ingredients are mixed, or when the base powder and the floating agent (patterning agent) are dry mixed, and the floating pigments are added by dry mixing. The advantage of this manufacturing method is that the amount of floating flower agent (patterning agent) is added to adjust the size of the hammer grain texture, which is more convenient to adjust the hammer grain texture; the disadvantage is that the floating flower agent (patterning agent) is added by dry mixing. When the recycled powder is reused, the content of the floating agent (patterning agent) in the recycled powder will change. When the proportion of the mixed use between the recycled powder coating and the original powder coating is imbalanced, the hammer texture of the coating film will easily change. The stability of the grain texture has a certain impact. Therefore, when recycled powder coatings are reused, the mixing ratio of new and old powder coatings should be appropriate to prevent the hammer texture from causing major changes.
The amount of floating flower (patterning agent) in the formula is 0.1% to 0.8% of the total formula. When a small amount of leveling agent is added to the base powder formula, the amount of floating flower (patterning agent) can be reduced, and the coating film The hammer texture becomes smaller as the amount of floating agent (patterning agent) increases. If the amount of addition is too large, the hammer texture will disappear, become a small pattern, or even become a smooth film. In addition, when the powder coating is baked and cured, it will be The heating method of the coating also has a certain effect on the hammer texture of the coating film.
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